DE669497C - Process for the production of clear, crack-free crystals after breeding from lye - Google Patents

Process for the production of clear, crack-free crystals after breeding from lye

Info

Publication number
DE669497C
DE669497C DEA84711D DEA0084711D DE669497C DE 669497 C DE669497 C DE 669497C DE A84711 D DEA84711 D DE A84711D DE A0084711 D DEA0084711 D DE A0084711D DE 669497 C DE669497 C DE 669497C
Authority
DE
Germany
Prior art keywords
lye
clear
crack
production
crystals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEA84711D
Other languages
German (de)
Inventor
Dr-Ing Ernst Burkhardt
Dr-Ing Dr Alexander Meissner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AEG AG
Original Assignee
AEG AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AEG AG filed Critical AEG AG
Priority to DEA84711D priority Critical patent/DE669497C/en
Application granted granted Critical
Publication of DE669497C publication Critical patent/DE669497C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/28—Methods of preparing ammonium salts in general

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von klaren, rissefreien Kristallen nach der Züchtung aus Lauge Bei der Züchtung von Kristallen aus Lauge, insbesondere z. B. der Züchtung von Rochellesalz (Kalium-Natrium-Tartrat), erhalten die klaren Kristalle beim Herausnehmen aus der Lauge häufig Risse und Sprünge. Diese Risse beruhen, wie gefunden wurde, auf Wärmespannungen, die im Kristall bei der Abkühlung auf Raumtemperatur und der Verdampfung der an seiner Oberfläche anhaftenden Lauge auftreten. Die Wärmespannungen entstehen dadurch, daß einerseits in Kristallen die Wärmeleitung in den verschiedenen Achsrichtungen sehr verschieden ist und andererseits bei der raschen Abkühlung an der Luft die Außenhülle eine andere Temperatur annimmt als das Innere des Kristalles.Process for the production of clear, crack-free crystals according to the cultivation from lye When growing crystals from lye, in particular z. B. the cultivation of Rochelle salt (potassium sodium tartrate), the clear crystals are obtained when removing it from the lye, there are often cracks and fissures. These cracks are based on how was found to be based on thermal stresses in the crystal when cooling to room temperature and the evaporation of the lye adhering to its surface. The thermal stresses arise from the fact that on the one hand in crystals the heat conduction in the various Axial directions is very different and on the other hand in the rapid cooling on In the air, the outer shell takes on a different temperature than the inside of the crystal.

Nach dem vorliegenden Verfahren werden diese Störungen durch Vorkehrungen beseitigt, die verhindern, daß bei der Abkühlung auf Zimmertemperatur im Innern des Kristalls Temperaturunterschiede auftreten. Dies wird dadurch erreicht, daß die kristalle unmittelbar nach dem Herausnehmen. aus der Lauge in ein sie nicht angreifendes, vorgewärmt es Fl2ssigkeitsbad höherer Wärmlekapazität leingelagert werden. Dadurch wird der Kristall sehr langsam und gleichmäßig abgekühlt, und Flüssigkeit und Kristall haben immler die gleiche Temperatur. Under the present procedure, these disruptions are covered by precautionary measures eliminated, which prevent when cooling to room temperature inside temperature differences occur in the crystal. This is achieved in that the crystals immediately after taking them out. from the lye into a they do not aggressive, preheated liquid bath with a higher thermal capacity will. This cools the crystal very slowly and evenly, and becomes liquid and crystal always have the same temperature.

Claims (1)

PANTENTANSPRUCH: Verfahren zur Herstellung von klaren, rissefreien Kristallen nach der Züchtung aus Lauge, dadurch gekennzeichnet, daß die gezüchteten Kristalle unmittelbar nach Herausnehmen aus der Lauge in einem die Kristalle nicht angreifenden, vorglewärmten Flüssigkeitsbad (Öl, Petroleum usw.) allmählich auf die Raumtemperatur abgekühlt werden. PANTENT CLAIM: Process for the production of clear, crack-free Crystals after cultivation from lye, characterized in that the cultivated Crystals immediately after removal from the liquor in one of the crystals not attacking, preheated liquid bath (oil, petroleum, etc.) gradually increases the room temperature can be cooled.
DEA84711D 1937-11-02 1937-11-02 Process for the production of clear, crack-free crystals after breeding from lye Expired DE669497C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA84711D DE669497C (en) 1937-11-02 1937-11-02 Process for the production of clear, crack-free crystals after breeding from lye

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA84711D DE669497C (en) 1937-11-02 1937-11-02 Process for the production of clear, crack-free crystals after breeding from lye

Publications (1)

Publication Number Publication Date
DE669497C true DE669497C (en) 1938-12-28

Family

ID=6949266

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA84711D Expired DE669497C (en) 1937-11-02 1937-11-02 Process for the production of clear, crack-free crystals after breeding from lye

Country Status (1)

Country Link
DE (1) DE669497C (en)

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